Update README.md

Author: amitdabade

README.md

@@ -39,6 +39,12 @@ function App() {
 
 ReactDOM.render(<App />, document.getElementById('root'));
 ```
+<iframe src="https://codesandbox.io/embed/github/amitdabade/react-use-fetch-demo/tree/main/?fontsize=14&hidenavigation=1&theme=dark"
+     style="width:100%; height:500px; border:0; border-radius: 4px; overflow:hidden;"
+     title="react-use-fetch-demo"
+     allow="accelerometer; ambient-light-sensor; camera; encrypted-media; geolocation; gyroscope; hid; microphone; midi; payment; usb; vr; xr-spatial-tracking"
+     sandbox="allow-forms allow-modals allow-popups allow-presentation allow-same-origin allow-scripts"
+   ></iframe>
 
 ## Demo: